In recent years, large amounts of floating species of Sargassum seaweeds have arrived on the coasts and beaches of some Caribbean islands, the Gulf of Mexico, Northern Brazil, and West Africa. These beaching events appear to be recurring almost every year and cause major environmental, health, and economic problems in the affected areas. These Sargassum influxes threaten the already fragile coastal ecosystems, such as coral reefs, mangroves, and seagrass beds; they also disrupt the livelihoods of communities, especially those associated with the tourism and fishing sectors. This study aimed to develop strategies for valorization of the sargassum biomass that arrives to the coasts of the Gulf of Mexico. The present study is the result of the project "ValoSarg", financed by the Dutch program Kansen voor Morgen in 2021. This project was carried out as a collaboration between Mexican researchers at IPICYT, Wageningen University and Research and the company AllOptimal b.v. The project was coordinated by Wageningen University and Research under the supervision of the Agriculture advisor of the Dutch Embassy in Mexico.This report includes a compilation of data on sargassum origin, composition, policies, management, and uses from a variety of resources, with a focus on the Mexican situation. We have consulted scientific literature, (governmental) public reports, internet resources; and discussed with parties involved in sargassum research or use, in order to formulate strategies for building new value chains for valorization of sargassum biomass.Besides the fundamental research by Universities or Research Centers on many sargassum-related topics, such as biology, biorefinery or applications, in Mexico, several commercial activities relate to sargassum harvesting, valorization and innovations. Most of these activities are being developed by small companies Sargassum as feedstock for biogas production 3.1
